diff --git a/threejs/tests/math/test_unit_math.ts b/threejs/tests/math/test_unit_math.ts
index 5d095315dc..226ebbb709 100644
--- a/threejs/tests/math/test_unit_math.ts
+++ b/threejs/tests/math/test_unit_math.ts
@@ -92,56 +92,56 @@
     test( "center", function() {
         var a = new THREE.Box2( zero2.clone(), zero2.clone() );
 
-        ok( a.center().equals( zero2 ), "Passed!" );
+        ok( a.getCenter().equals( zero2 ), "Passed!" );
 
         a = new THREE.Box2( zero2, one2 );
         var midpoint = one2.clone().multiplyScalar( 0.5 );
-        ok( a.center().equals( midpoint ), "Passed!" );
+        ok( a.getCenter().equals( midpoint ), "Passed!" );
     });
 
     test( "size", function() {
         var a = new THREE.Box2( zero2.clone(), zero2.clone() );
 
-        ok( a.size().equals( zero2 ), "Passed!" );
+        ok( a.getSize().equals( zero2 ), "Passed!" );
 
         a = new THREE.Box2( zero2.clone(), one2.clone() );
-        ok( a.size().equals( one2 ), "Passed!" );
+        ok( a.getSize().equals( one2 ), "Passed!" );
     });
 
     test( "expandByPoint", function() {
         var a = new THREE.Box2( zero2.clone(), zero2.clone() );
 
         a.expandByPoint( zero2 );
-        ok( a.size().equals( zero2 ), "Passed!" );
+        ok( a.getSize().equals( zero2 ), "Passed!" );
 
         a.expandByPoint( one2 );
-        ok( a.size().equals( one2 ), "Passed!" );
+        ok( a.getSize().equals( one2 ), "Passed!" );
 
         a.expandByPoint( one2.clone().negate() );
-        ok( a.size().equals( one2.clone().multiplyScalar( 2 ) ), "Passed!" );
-        ok( a.center().equals( zero2 ), "Passed!" );
+        ok( a.getSize().equals( one2.clone().multiplyScalar( 2 ) ), "Passed!" );
+        ok( a.getCenter().equals( zero2 ), "Passed!" );
     });
 
     test( "expandByVector", function() {
         var a = new THREE.Box2( zero2.clone(), zero2.clone() );
 
         a.expandByVector( zero2 );
-        ok( a.size().equals( zero2 ), "Passed!" );
+        ok( a.getSize().equals( zero2 ), "Passed!" );
 
         a.expandByVector( one2 );
-        ok( a.size().equals( one2.clone().multiplyScalar( 2 ) ), "Passed!" );
-        ok( a.center().equals( zero2 ), "Passed!" );
+        ok( a.getSize().equals( one2.clone().multiplyScalar( 2 ) ), "Passed!" );
+        ok( a.getCenter().equals( zero2 ), "Passed!" );
     });
 
     test( "expandByScalar", function() {
         var a = new THREE.Box2( zero2.clone(), zero2.clone() );
 
         a.expandByScalar( 0 );
-        ok( a.size().equals( zero2 ), "Passed!" );
+        ok( a.getSize().equals( zero2 ), "Passed!" );
 
         a.expandByScalar( 1 );
-        ok( a.size().equals( one2.clone().multiplyScalar( 2 ) ), "Passed!" );
-        ok( a.center().equals( zero2 ), "Passed!" );
+        ok( a.getSize().equals( one2.clone().multiplyScalar( 2 ) ), "Passed!" );
+        ok( a.getCenter().equals( zero2 ), "Passed!" );
     });
 
     test( "containsPoint", function() {
@@ -333,56 +333,56 @@
     test( "center", function() {
         var a = new THREE.Box3( zero3.clone(), zero3.clone() );
 
-        ok( a.center().equals( zero3 ), "Passed!" );
+        ok( a.getCenter().equals( zero3 ), "Passed!" );
 
         a = new THREE.Box3( zero3.clone(), one3.clone() );
         var midpoint = one3.clone().multiplyScalar( 0.5 );
-        ok( a.center().equals( midpoint ), "Passed!" );
+        ok( a.getCenter().equals( midpoint ), "Passed!" );
     });
 
     test( "size", function() {
         var a = new THREE.Box3( zero3.clone(), zero3.clone() );
 
-        ok( a.size().equals( zero3 ), "Passed!" );
+        ok( a.getSize().equals( zero3 ), "Passed!" );
 
         a = new THREE.Box3( zero3.clone(), one3.clone() );
-        ok( a.size().equals( one3 ), "Passed!" );
+        ok( a.getSize().equals( one3 ), "Passed!" );
     });
 
     test( "expandByPoint", function() {
         var a = new THREE.Box3( zero3.clone(), zero3.clone() );
 
         a.expandByPoint( zero3 );
-        ok( a.size().equals( zero3 ), "Passed!" );
+        ok( a.getSize().equals( zero3 ), "Passed!" );
 
         a.expandByPoint( one3 );
-        ok( a.size().equals( one3 ), "Passed!" );
+        ok( a.getSize().equals( one3 ), "Passed!" );
 
         a.expandByPoint( one3.clone().negate() );
-        ok( a.size().equals( one3.clone().multiplyScalar( 2 ) ), "Passed!" );
-        ok( a.center().equals( zero3 ), "Passed!" );
+        ok( a.getSize().equals( one3.clone().multiplyScalar( 2 ) ), "Passed!" );
+        ok( a.getCenter().equals( zero3 ), "Passed!" );
     });
 
     test( "expandByVector", function() {
         var a = new THREE.Box3( zero3.clone(), zero3.clone() );
 
         a.expandByVector( zero3 );
-        ok( a.size().equals( zero3 ), "Passed!" );
+        ok( a.getSize().equals( zero3 ), "Passed!" );
 
         a.expandByVector( one3 );
-        ok( a.size().equals( one3.clone().multiplyScalar( 2 ) ), "Passed!" );
-        ok( a.center().equals( zero3 ), "Passed!" );
+        ok( a.getSize().equals( one3.clone().multiplyScalar( 2 ) ), "Passed!" );
+        ok( a.getCenter().equals( zero3 ), "Passed!" );
     });
 
     test( "expandByScalar", function() {
         var a = new THREE.Box3( zero3.clone(), zero3.clone() );
 
         a.expandByScalar( 0 );
-        ok( a.size().equals( zero3 ), "Passed!" );
+        ok( a.getSize().equals( zero3 ), "Passed!" );
 
         a.expandByScalar( 1 );
-        ok( a.size().equals( one3.clone().multiplyScalar( 2 ) ), "Passed!" );
-        ok( a.center().equals( zero3 ), "Passed!" );
+        ok( a.getSize().equals( one3.clone().multiplyScalar( 2 ) ), "Passed!" );
+        ok( a.getCenter().equals( zero3 ), "Passed!" );
     });
 
     test( "containsPoint", function() {
diff --git a/threejs/three.d.ts b/threejs/three.d.ts
index 830edbf864..05b903bce6 100644
--- a/threejs/three.d.ts
+++ b/threejs/three.d.ts
@@ -1,4 +1,4 @@
-// Type definitions for three.js r80
+// Type definitions for three.js r81
 // Project: http://mrdoob.github.com/three.js/
 // Definitions by: Kon <http://phyzkit.net/>, Satoru Kimura <https://github.com/gyohk>, Florent Poujol <https://github.com/florentpoujol>, SereznoKot <https://github.com/SereznoKot>
 // Definitions: https://github.com/borisyankov/DefinitelyTyped
@@ -2778,8 +2778,8 @@ declare namespace THREE {
         copy(box: this): this;
         makeEmpty(): Box2;
         isEmpty(): boolean;
-        center(optionalTarget?: Vector2): Vector2;
-        size(optionalTarget?: Vector2): Vector2;
+        getCenter(optionalTarget?: Vector2): Vector2;
+        getSize(optionalTarget?: Vector2): Vector2;
         expandByPoint(point: Vector2): Box2;
         expandByVector(vector: Vector2): Box2;
         expandByScalar(scalar: number): Box2;
@@ -2813,8 +2813,8 @@ declare namespace THREE {
         copy(box: this): this;
         makeEmpty(): Box3;
         isEmpty(): boolean;
-        center(optionalTarget?: Vector3): Vector3;
-        size(optionalTarget?: Vector3): Vector3;
+        getCenter(optionalTarget?: Vector3): Vector3;
+        getSize(optionalTarget?: Vector3): Vector3;
         expandByPoint(point: Vector3): Box3;
         expandByVector(vector: Vector3): Box3;
         expandByScalar(scalar: number): Box3;
@@ -3175,7 +3175,7 @@ declare namespace THREE {
         set(start?: Vector3, end?: Vector3): Line3;
         clone(): this;
         copy(line: this): this;
-        center(optionalTarget?: Vector3): Vector3;
+        getCenter(optionalTarget?: Vector3): Vector3;
         delta(optionalTarget?: Vector3): Vector3;
         distanceSq(): number;
         distance(): number;
@@ -3330,7 +3330,7 @@ declare namespace THREE {
          * Transposes this matrix into the supplied array r, and returns itself.
          */
         transposeIntoArray(r: number[]): number[];
-        fromArray(array: number[]): Matrix3;
+        fromArray(array: number[], offset?: number): Matrix3;
         toArray(): number[];
 
         // deprecated
@@ -3513,7 +3513,7 @@ declare namespace THREE {
          */
         makeOrthographic(left: number, right: number, top: number, bottom: number, near: number, far: number): Matrix4;
         equals( matrix: Matrix4 ): boolean;
-        fromArray(array: number[]): Matrix4;
+        fromArray(array: number[], offset?: number): Matrix4;
         toArray(): number[];
 
         // deprecated